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One of the basic and commonly used display devices is Cathode Ray Tube (CRT). A cathode ray tube is based on the simple concept that an electronic beam, when hits a phosphorescent surface, produces a beam of light (momentarily - though we later describe surfaces that produce light intensities lashing over a period of time). Further, the beam of light
itself can be focused to any point on the screen by using suitable electronic / magnetic fields. The direction and intensity of the fields will allow one to determine the extent of the defection of the beam. Further these electronic / magnetic fields can be easily manipulated by using suitable electric fields with this background. In following section we describe the structure and working of the simple CRT.
Simple CRT makes use of a conical glass tube. At the narrow end of the glass tube an electronic gun is kept. This gun generates electrons that will be made to pass through the magnetic system called yoke. This magnetic system is used for making the electronic beam to fall throughout the broad surface of the glass tube. The broad surface of the glass tube contains a single coat of high quality phosphorus. This reflects the electronic beam makes it to fall on the computer screen.
A pair of focusing grids - one horizontal and another vertical does the actual focusing of the electronic beam on to the screen. Electronic or magnetic fields operate these grids. Depending on the direction (positive or negative) and the intensity of the fields applied to them, the beam is deflected horizontally (or vertically) and thus, by using a suitable combination of these focusing grids; the beam can be focused to any point on the screen.
So, we now have a mechanism wherein any point on the screen can be illuminated (or made dark by simply switching off the beam). Hence, from a graphics point of view, any picture can be traced on the screen by the electron beam by suitably and continuously manipulating the focusing grids and we get to see the picture on the screen "A basic graphic picture" of course, since the picture produced vanishes once the beam is removed, to give the effect to continuity, we have to keep the beam retracing the picture continuously - (Refreshing).
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What CRT monitors draw a screen by making two passes?
interlacing
What are the graphics monitors and workstation in computer graphics?
Crt monitors,lcd's & led's
Can an electron at rest be set in motion by the magnetic field?
Sure. A charge in a magnetic field experiences a force. A force acting on a mass produces acceleration. Remember the old-style TV sets that were about 6 feet deep from front to back ? That type of picture tube is called a 'CRT', for "cathode-ray tube'. There's a hot wire at the back end of the picture tube that produces a cloud of electrons. The front face of the picture tube has a high positiver voltage on it, to attract the negative electrons to the front. On the way there, the electrons have to go through these magnet coils that are around the neck of the picture tube. The magnetic field inside the neck pulls the stream of electrons left and right, up and down, left and right, and that's how they draw a picture on the front face when they get there.
What happens if you put a magnet on a lamp?
It depends on the type of lamp and the strength of the magnet. An incandescent lamp works literally by running current through the filament to heat it. Parts of the bulb might be magnetic, so if the magnet were ridiculously powerful it might deform or break them. Fluorescent and Neon lamps use ionization, so although I haven't tried it, I'd bet a reasonably strong magnet might affect them. If you have an old CRT-based television or computer monitor you can see how this works by placing a magnet near it -- note, this can cause permanent effects to the picture quality, so either keep the magnet at a distance where the effect is minimal or use a CRT you don't care about. LED lamps are so small and well-constructed that I think they're more like incandescent lamps -- a really powerful magnet might damage them, but otherwise is unlikely to affect them.
Are electromagnets used in cameras?
Camera magnets are actually electromagnets; the magnetic field on an electromagnet is only there when you need it. They work like magnets everywhere else do; they are used in place of springs.
What could be used to output a picture when a hardcopy is not needed?
CRT
What are the two differences between CRT monitor and a LCD monitor?
CRT monitors use a beam of electrons to form the picture - LCD's use microscopic pixels. CRT's need large amounts of electricity to form the picture - LCD's work with low voltages.
Why lw-crt tv box dot display on flat monitors?
Why lw-crt tv box don't display on flat monitors? They actually try to display but the picture will flicker and disappear.CRT is "Cathode Ray Tube" and LCD is "Liquid Display Cristal" thus the units were manufactured to specifically produce for CRT monitors not LCD monitors.LCD monitors have a different resolution and image refresh rate compared to CRT monitors therefore both monitors (LCD & CRT) monitors, compose the picture in different formats.So the LW-CRT-TV box produce a picture for low resolution monitors that is to say CRT.
How can you see out signal on oscillscope?
A; An analog oscilloscope will display a signal to a CRT the same principle as a TV can display movies
What is the principle of the oscilloscope?
A scope is nothing else then a display instrument it will amplify and display a signal on a CRT for visual analysis
How are television tubes discharged safely?
Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon painted on the CRT after removing the anode.
The number of active picture elements in a television image depends upon?
CRT screen size
What is CRT in TV terms?
The CRT refers to cathode ray tube. This is the oldest of the varous TV types. More recent developments have been projection, plasma, etc.
Inside parts of a CRT monitors and its picture?
Frankly, if you know there are six parts, then by definition, you know the answer. Stop trolling,.
Does leaving a TV on in power save mode damage the picture tube?
It shouldn't. If there is no actual power to the CRT (no picture visible) then there really can't be any degradation of the tube.
do lcd tvs give better picture even if i dont have a hd cable box?
An LCD television will only display high definition picture if an HD equipment is used as an input to it. Standing on its own, compared to a CRT television, modern LCD TVs have quicker reponse times and never suffer from flickering images. Both types of monitors (newer models) provide bright and vibrant color display. However, LCDs cannot display the maximum color range that a CRT can. In terms of image sharpness, when an LCD is running at its native resolution the picture quality is perfectly sharp. On a CRT the sharpness of the picture can be blemished by soft edges or a flawed focus. Also, a CRT TV can be viewed from almost any angle, but with an LCD this is often a problem.
IS A SONY trinitron TV the same as an lcd TV?
One is the older style CRT picture tube and the other is a Flat Screen.
